<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATI0N EXTRACTED FROM DELTEK
SYSTEMS, INC. FINANCIAL STATEMENTS INCLUDED IN THE COMPANY'S STATEMENT ON FORM
10-K AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS
AND NOTES THERETO.
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> US DOLLARS

<S>                                  <C>                     <C>                     <C>
<PERIOD-TYPE>                        YEAR                   YEAR                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1995             DEC-31-1996             DEC-31-1997
<PERIOD-START>                             JAN-01-1995             JAN-01-1996             JAN-01-1997
<PERIOD-END>                               DEC-31-1995             DEC-31-1996             DEC-31-1997
<EXCHANGE-RATE>                                      1                       1                       1
<CASH>                                               0<F1>               8,338                  10,272
<SECURITIES>                                         0<F1>                   0                  14,949
<RECEIVABLES>                                        0<F1>               6,417                   9,247
<ALLOWANCES>                                         0<F1>                (396)                   (422)
<INVENTORY>                                          0<F1>                 209                      95
<CURRENT-ASSETS>                                     0<F1>              15,595<F4>              37,400<F8>
<PP&E>                                               0<F1>               4,046                   5,474
<DEPRECIATION>                                       0<F1>              (2,168)                 (2,839)
<TOTAL-ASSETS>                                       0<F1>              20,202<F5>              42,724<F9>
<CURRENT-LIABILITIES>                                0<F1>               8,716                  17,972
<BONDS>                                              0<F1>                   0                       0
<PREFERRED-MANDATORY>                                0<F1>                   0                       0
<PREFERRED>                                          0<F1>                   0                       0
<COMMON>                                             0<F1>                  15                      17
<OTHER-SE>                                           0<F1>              11,486                  24,735
<TOTAL-LIABILITY-AND-EQUITY>                         0<F1>              20,202                  42,724
<SALES>                                         26,349                  34,780                  48,782
<TOTAL-REVENUES>                                26,849                  34,780                  34,572
<CGS>                                                0                       0                       0
<TOTAL-COSTS>                                   17,176                  24,575                  32,582
<OTHER-EXPENSES>                                     0                       0                       0
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                                   0                       0                       0
<INCOME-PRETAX>                                 10,066<F2>              10,587<F6>              16,946<F10>
<INCOME-TAX>                                        45                      93                   5,634
<INCOME-CONTINUING>                             10,021                  10,205                  16,200
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                    10,021<F3>              10,494<F7>              11,312<F11>
<EPS-PRIMARY>                                    $0.67                   $0.70                   $0.68
<EPS-DILUTED>                                    $0.64                   $0.67                   $0.66
<FN>
<F1>BALANCE SHEET WAS NOT REQUIRED FOR THE YEAR ENDING DEC. 31, 1995
<F2>INCLUDES INTEREST INCOME OF $393.
<F3>AS A SUBCHAPTER "S" CORPORATION PRIOR TO THE PUBLIC OFFERING THE PROFROMA
INCOME TAX PROVISION, PROFORMA NET INCOME AND PROFORMA DILUTED NET INCOME PER
SHARE WAS 3,827, 8,239 AND $0.40 PER SHARE.
<F4>INCLUDES PREPAID EXPENSES OF $1,058.
<F5>INCLUDES COMPUTER SOFTWARE COSTS-NET OF $2,581. ALSO INCLUDES OTHER ASSETS OF
$138.
<F6>INCLUDES INTEREST INCOME OF $382.
<F7>AS A SUBCHAPTER "S" CORPORATION PRIOR TO THE PUBLIC OFFERING. THE PROFROMA
INCOME TAX PROVISION, PROFORMA NET INCOME AND PROFORMA DILUTED NET INCOME PER
SHARE WAS 4,131, 6,456 AND $0.41 PER SHARE.
<F8>INCLUDES PREPAID EXPENSES OF $3,259.
<F9>INCLUDES COMPUTER SOFTWARE COSTS-NET OF $2,579. ALSO INCLUDES OTHER ASSETS OF
$110.
<F10>INCLUDES INTEREST INCOME OF $746.
<F11>AS A SUBCHAPTER "S" CORPORATION PRIOR TO THE PUBLIC OFFERING.  THE PROFROMA
INCOME TAX PROVISION, PROFORMA NET INCOME AND PROFORMA DILUTED NET INCOME PER
SHARE WAS 6,516, 10,430 AND $0.61 PER SHARE.
</FN>


</TABLE>